Sub committees are used for delegation, focus and time efficiency. The type of sub committee can vary depending on your task, size and time frame. Below are some definitions on different sub committees.
Standing committees: permanent responsibilities, that operate all year round. E.g., Finance, coaching etc.
Short-term sub committees: Pre determined period, with a start and end date. Selected focus E.g., Social and fundraising event
Task groups: gather information for a project to present to the committee who then make the final decision E.g., building a new clubroom, providing a vending machine etc